In reference to your inquiry on our policy disallowing the carrying of
firearms in our warehouse stores.
Costco does not believe that it is necessary for firearms to be brought
into its warehouse stores, except in the case of authorized law
enforcement officers. For the protection of all our members and
employees, we feel this is a reasonable and prudent precaution to ensure
a pleasant shopping experience and safe workplace. Our policy is meant
to protect our members and employees in all warehouses around the world.
This is not a new policy and we do not customize the policy for each
individual city/county/state/country where we do business.
Bringing a firearm into our warehouse does not enhance the shopping
experience. We are sorry the message you are hearing is that "we don't
want you." It is the firearms that we exclude in the warehouses, not the
carriers.

You will note that Camille makes no effort whatsoever to explain how excluding CCW by customers protects Costco's members and employees. If someone came in there without a CCW license but WITH a GUN, and started to shoot random people, how would prohibiting CCW in the store protect anyone? How does keeping people who don't commit gun crimes out of the store protect anyone? Who argued that we want to bring guns into the store to "enhance the shopping experience" (as though we think of shopping like a day at the spa?!), to make her say that since they don't, we shouldn't be allowed to? I bring my gun in because on the way to the store, while in the store, and on the way home from the store, I could become the victim of a violent crime and need the gun for my own defense of my life, NOT to "enhance my shopping experience."

The kind of lunatic that they might be worried about shooting people in their store is not the kind of person who would a) have a CCW license and a legally carried firearm, and b) obey the sign that says "no guns" when they already plan to MURDER people.